My wife would like me to dye a Canadian flag into the hatch cover of the new kit S&G I'm about to build for her. I'll also be dyeing the deck sheer panels and coaming lip but I'm not sure of a good technique to dye a sharp edged pattern onto the deck. I don't want any bleed through across the edge of the pattern. I've heard of scoring the pattern and using masking tape as well but I don't want to try something experimental for this since it will be so visible.

Has anyone done this successfully and can you share how you did it?